From 976a0161becef40cda31090ffd17a12442905b0c Mon Sep 17 00:00:00 2001
From: okan
Date: Tue, 21 May 2013 00:29:20 +0000
Subject: handle _NET_WM_STATE ClientMessage; from Alexander Polakov.

---
 calmwm.h  |  9 ++++++++-
 xevents.c |  6 +++++-
 xutil.c   | 39 ++++++++++++++++++++++++++++++++++++++-
 3 files changed, 51 insertions(+), 3 deletions(-)

diff --git a/calmwm.h b/calmwm.h
index e7f6d0e..a80fde3 100644
--- a/calmwm.h
+++ b/calmwm.h
@@ -15,7 +15,7 @@
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  *
- * $OpenBSD: calmwm.h,v 1.207 2013/05/20 21:13:58 okan Exp $
+ * $OpenBSD: calmwm.h,v 1.208 2013/05/21 00:29:20 okan Exp $
  */
 
 #ifndef _CALMWM_H_
@@ -482,6 +482,8 @@ void			 xu_ewmh_net_desktop_names(struct screen_ctx *, char *,
 
 void			 xu_ewmh_net_wm_desktop(struct client_ctx *);
 Atom 			*xu_ewmh_get_net_wm_state(struct client_ctx *, int *);
+void 			 xu_ewmh_handle_net_wm_state_msg(struct client_ctx *,
+			     int, Atom , Atom);
 void 			 xu_ewmh_set_net_wm_state(struct client_ctx *);
 void 			 xu_ewmh_restore_net_wm_state(struct client_ctx *);
 
@@ -543,6 +545,11 @@ enum {
 	_NET_WM_STATE_MAXIMIZED_HORZ,
 	EWMH_NITEMS
 };
+enum {
+	_NET_WM_STATE_REMOVE,
+	_NET_WM_STATE_ADD,
+	_NET_WM_STATE_TOGGLE
+};
 struct atom_ctx {
 	char	*name;
 	Atom	 atom;
diff --git a/xevents.c b/xevents.c
index 25927ec..65d7628 100644
--- a/xevents.c
+++ b/xevents.c
@@ -15,7 +15,7 @@
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  *
- * $OpenBSD: xevents.c,v 1.81 2013/05/20 21:32:00 okan Exp $
+ * $OpenBSD: xevents.c,v 1.82 2013/05/21 00:29:20 okan Exp $
  */
 
 /*
@@ -359,6 +359,10 @@ xev_handle_clientmessage(XEvent *ee)
 			client_ptrsave(old_cc);
 		client_ptrwarp(cc);
 	}
+	if (e->message_type == ewmh[_NET_WM_STATE].atom &&
+	    e->format == 32)
+		xu_ewmh_handle_net_wm_state_msg(cc,
+		    e->data.l[0], e->data.l[1], e->data.l[2]);
 }
 
 static void
diff --git a/xutil.c b/xutil.c
index 7273702..7872ee9 100644
--- a/xutil.c
+++ b/xutil.c
@@ -15,7 +15,7 @@
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  *
- * $OpenBSD: xutil.c,v 1.65 2013/05/20 21:13:58 okan Exp $
+ * $OpenBSD: xutil.c,v 1.66 2013/05/21 00:29:20 okan Exp $
  */
 
 #include <sys/param.h>
@@ -439,6 +439,43 @@ xu_ewmh_get_net_wm_state(struct client_ctx *cc, int *n)
 	return (state);
 }
 
+void
+xu_ewmh_handle_net_wm_state_msg(struct client_ctx *cc, int action,
+    Atom first, Atom second)
+{
+	int i;
+	static struct handlers {
+		int atom;
+		int property;
+		void (*toggle)(struct client_ctx *);
+	} handlers[] = {
+		{ _NET_WM_STATE_MAXIMIZED_VERT,
+			CLIENT_VMAXIMIZED,
+			client_vmaximize },
+		{ _NET_WM_STATE_MAXIMIZED_HORZ,
+			CLIENT_HMAXIMIZED,
+			client_hmaximize },
+	};
+
+	for (i = 0; i < nitems(handlers); i++) {
+		if (first != ewmh[handlers[i].atom].atom &&
+		    second != ewmh[handlers[i].atom].atom)
+			continue;
+		switch (action) {
+		case _NET_WM_STATE_ADD:
+			if ((cc->flags & handlers[i].property) == 0)
+				handlers[i].toggle(cc);
+			break;
+		case _NET_WM_STATE_REMOVE:
+			if (cc->flags & handlers[i].property)
+				handlers[i].toggle(cc);
+			break;
+		case _NET_WM_STATE_TOGGLE:
+			handlers[i].toggle(cc);
+		}
+	}
+}
+
 void
 xu_ewmh_restore_net_wm_state(struct client_ctx *cc)
 {
-- 
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